In one corner of the garden there stands a tittle board，_______“Keep off the grass．”

1. A.
   On which writes
2. B.
   it says
3. C.
   on which is read
4. D.
   which reads

In one corner of the garden there stands a tittle board，_______“Keep off the grass．”

    A．On which writes B．it says          C．on which is read  D．which reads